feat: automate database OSS backups

deploy/systemd/genarrative-database-backup.service

@@ -0,0 +1,18 @@
+[Unit]
+Description=Genarrative SpacetimeDB OSS Backup
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+Type=oneshot
+User=root
+Group=root
+WorkingDirectory=/opt/genarrative/current
+EnvironmentFile=/etc/genarrative/api-server.env
+ExecStart=/usr/bin/node /opt/genarrative/current/scripts/database-backup-to-oss.mjs --env-file /etc/genarrative/api-server.env --stop-service spacetimedb.service
+
+# 备份需要停止 / 启动 spacetimedb.service，并读取 /stdb、写入 /var/lib/genarrative/database-backups。
+PrivateTmp=true
+ProtectSystem=full
+ReadWritePaths=/stdb /var/lib/genarrative
+

deploy/systemd/genarrative-database-backup.timer

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+[Unit]
+Description=Run Genarrative SpacetimeDB OSS Backup Daily
+
+[Timer]
+OnCalendar=*-*-* 03:20:00
+Persistent=true
+RandomizedDelaySec=600
+Unit=genarrative-database-backup.service
+
+[Install]
+WantedBy=timers.target
+